public class LoanCalculator {
    private int a; //借了多少钱
    private int m; //借了多少月
    private double y; //年利率
    private double avgInterest;
    private double avgCap;
    public LoanCalculator(int a, int m, double y)
 {
        this.a = a;
        this.m = m;
        this.y = y;
    }
    public void calculateAvgInterest() {
        avgInterest = (m+1) * a * (y/12) / 2;
        print(1);
    }
    public void calculateAvgCap() {
        double x = Math.pow(1+(y/12), m);
        avgCap = m * a * (y/12) * x / (x-1) - a;
        print(2);
    }
    private void print(int type) {
        if(type == 1)
            System.out.println("AVGINT:" + avgInterest);
        if(type == 2)
            System.out.println("AVGCAP:" + avgCap);
    }
}
